# iGradient vs RF Engineer's Calc

The clearest difference is price: RF Engineer's Calc at Free against iGradient's $2.99. iGradient's advantage is device support (3 vs 1) and iOS requirement (9.3 vs 16.1). On update cadence, ads and in-app purchases there is nothing between them.

RF Engineer's Calc is free to download; iGradient costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

iGradient ships an update every 6 months, RF Engineer's Calc every 10 months. The most recent releases landed on October 10, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | iGradient | RF Engineer's Calc |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[4.3 (7 ratings)](https://appshunter.io/ios/app/igradient/id514399562/reviews)** | — |
| Number of ratings | **7** | — |
| Positive reviews | 93.5% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 10 months |
| Monetization | Free | — |
| Size | 10 MB | 43 MB |
| Requires iOS | **9.3** | 16.1 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Ivan Perre](https://appshunter.io/developer/514399565) | [GRAHAM JOHN SMITH](https://appshunter.io/developer/1668396908) |

## What reviewers say

### iGradient

[App page](https://appshunter.io/ios/app/igradient/id514399562)

This app uses your device's sensors to accurately measure any 2D angle. It intelligently detects orientation and provides readings in degrees, radians, or as a gradient. Ideal for various practical applications requiring precise angle measurements.

**Highlights:** Measures 2D angles, Intelligent orientation detection, Reads in degrees, radians, or gradient, Accurate to 1 degree, Switches between horizontal/vertical axis, Holds measurement, No calibration needed

**Features:** macOS Compatibility

**In-app purchases:** none


### RF Engineer's Calc

[App page](https://appshunter.io/ios/app/rf-engineers-calc/id1668396906)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is iGradient free?

iGradient costs $2.99, with no in-app purchases.

### Is RF Engineer's Calc free?

RF Engineer's Calc is free to download, with no in-app purchases.

### Do iGradient or RF Engineer's Calc have ads?

Neither iGradient nor RF Engineer's Calc shows ads.

### Which is updated more often, iGradient or RF Engineer's Calc?

iGradient ships an update every 6 months, and RF Engineer's Calc every 10 months. Most recently, iGradient was updated on October 10, 2026 and RF Engineer's Calc on October 6, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*